SMOOTH SURFACE MODIFIED ROOFING SYSTEM
OVER NAILABLE DECK
3-PLY
4-PLY
GUIDE SPEC H3-NMC-CR
GUIDE SPEC H4-NMC-CR
DESCRIPTION
??Cold applied modified built-up roof. Consists of mechanically attached #606 Modified Underlayment and 2 or 3
plies of #608 Modified Fiberglass Base Sheet adhered with Cold Adhesive. Membrane is surfaced with #902 or
#903 allowed to cure 3 to 6 months and finished with Reflective Coating. Specification suitable for nailable deck
without insulation.
?? #280 White Elastomeric Roof Coating or #869 Elastomeric Aluminum Roof Coating Energy Star qualified.
?? Roof warranties available. Consult with Henry Representative for requirements in your area.
gallons per 100 ft.2 or
INSERT “PART 1 – GENERAL” as part of this specification
PART 2 – PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS
A. Materials manufactured or supplied by Henry
Company, 2911 Slauson Ave., Huntington Park,
CA 90255. (323) 583-5000 or (800) 486-1278.
2.02 PRODUCT DELIVERY
A. Bulk delivery material shall be accompanied by a
Henry Company bill of lading.
2.03 MATERIALS
A. Sheathing paper (wood decks only) -1 ply
B. BASE PLY
1. #606 Modified Underlayment, Inverted
C. INTERPLY – 2 or 3 layers
1. #608 30# Modified Fiberglass Ply Sheet
D. INTERPLY ADHESIVE & SURFACING
1. #902 Permanent Bond Adhesive (Western U.S.)
or
2. #903 High Solids Adhesive (Eastern U.S.)
F. REFLECTIVE SURFACING
1. #229 Aluminum Emulsion - 1½ gallons per
100 ft.2 or
2. #869 Elastomeric Aluminum Roof Coating1½ to 2 gallons per 100 ft.2 or
3. #220 Fibered Aluminum Coating - 1½
H3&4-NMC-CR
4.
#280 Premium White Elastomeric Coating –
1 to 1¼ gallons per 100 ft.2 over #291 Base
Coat or
5. #299 Premium Elastomeric White Roof
Coating - 1 to 1¼ gallons per 100 ft.2 over
#291 Base Coat.
6. #291 Premium Elastom eric Base Coat - 1 to
1¼ gallons per 100 ft.2
G. MISCELLANEOUS PRODUCTS
1. Primer
a. #104 Asphalt Primer or
b. #103 VOC Compliant Primer
2. #906 Plastic Cement
3. #209 ElastoMastic
4. ModifiedPlus NP180s/s SBS modified base
flashing.
5. Ruftac – 75 mil - SBS modified self-adhesive
membrane
6. Reinforcing Glass – Yellow
7. Walk pads
8. Approved mechanical fasteners
01.07.2005
PART 3 – APPLICATION
3.01 GENERAL
A. Henry Company’s General Requirements and
Product Data are a part of this specification.
B. (Include if reroofing) Do not remove any more
roofing than can be replaced the same day.
3.02 EXAMINATION
A. Inspect
deck
and
advise
Owner’s
Representative of any corrections required
before proceeding with roofing.
3.03 PREPARATION
A. Sweep or vacuum all surfaces prior to
commencement of roofing. Allow surface to dry
before proceeding.
B. Cut base and ply sheets into appropriate
lengths.
Allow plies to flatten before
application.
3.04 MEMBRANE APPLICATION
A. (Wood decks only.) Over roof deck install one
layer of rosin sheathing paper. Lap each sheet
2” and nail sufficiently to hold in place.
B. BASE PLY Install #606 base granule side
down with 2” side laps and 4” end laps. Apply
the first sheet of base ply with a 12” width and
the remaining sheets full width. Nail base ply
at side laps 9” on center and 18” on center,
staggered in two rows 12” from each edge.
C. INTERPLIES (SELECT 1)
1. TO COMPLETE 3-PLY ASSEMBLY: Over the
base ply, apply two #608 Modified interply
sheets set in a uniform application of
[#902] or [#903] cold applied cement at a
rate of 2 gallons per 100 ft.2.. Apply the first
sheet with an 18” width then over that a full
width piece. Install the remaining sheets full
width overlapping preceding sheet 19”. On
slopes greater than 1½”:12”, backnail interply
sheets 2” from top edge, 12” on center. On
slopes over 3” in 12”, install interplies
parallel to slope blindnailing 4” end laps
only, 6” on center.
2. TO COMPLETE 4-PLY ASSEMBLY: Over the
base ply, apply three #608 Modified interply
sheets set in a uniform application of
[#902] or [#903] cold applied cement at a
rate of 2 gallons per 100 ft.2. Starting at the
low point, apply a 12” wide piece, then over
H3&4-NMC-CR
that, one 24” wide, then over both, a full width
piece. Install the remaining sheets full width
overlapping preceding sheet 24-2/3”.
D. Before the end of each day, roll the membrane
with a weighted roller (75 lb. minimum).
Provide water stops and seal all terminations.
3.05 FLASHINGS
A. Install Flashing Specification #180.
3.06 SURFACING
A. After
adhesive has thoroughly cured (no
solvent odor is evident and laps cannot be
pulled apart), sweep or pressure blow dust
and debris from the roof surface to provide a
clean surface. Hose and/or scrub off with
water any residue accumulation.
B. Protect adjacent walls not scheduled for
surfacing. Protect equipment, roof top units,
etc. from overspray.
C. Cover prepared surfaces in a uniform
application of [#902] or [#903] cold applied
adhesive at a rate not less than 4 gallons per
100 sq.ft.
D. Spray base flashings and other designated
surfaces with [#902] or [#903].
3.07 REFLECTIVE COATING
A. Allow surfacing to completely cure not less than
90 days. Clean the surface of dust and debris.
Scrub out any pockets of residue.
B. Water based coatings (#229, #280, #291, #299)
require a base coat of #107 applied at rate of 3
gallons per 100 ft.2.
C. SELECT ONE:
1. Apply [#229 Aluminum Emulsion] or [#869
Elastomeric Aluminum Coating] or [#220
Fibered Aluminum Coating] at a rate not less
than 1½ gallons /100 ft.2 in one coat.
2. White Elastomeric Coating. Apply [#280] or
[#299] White Elastomeric Roof Coating over
a base coat of #291.
a. Apply #291 Premium Elastomeric Base
Coat at a rate not less than one
gallon/100 ft.2. per coat.
b. Apply [#280] or [#299] White Elastomeric
Roof Coating at a rate not less than one
gallon/100 ft.2 per coat.
c. Apply base and top coat the same day.
Allow to dry thoroughly between coats.
Schedule work so second coat can dry
before nightfall. Apply second coat at
right angles to first coat
D. Any areas that peel must be redone before the
project will be considered complete.
01.07.2005